/Engine/Source/Runtime/MediaAssets/Public/MediaSource.h
Media sources describe the location and/or settings of media objects that can be played in a media player, such as a video file on disk, a video stream on the internet, or a web cam attached to or built into the target device. The location is encoded as a media URL string, whose URI scheme and optional file extension will be used to locate a suitable media player.
class UMediaSource : public [UObject](API\Runtime\CoreUObject\UObject\UObject), public [IMediaOptions](API\Runtime\Media\IMediaOptions)